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Looking to put together a group buy for replacement 4th gen carb vacuum pistons. These are the rubber diaphragm that moves the needle up and down. You cannot buy OEM replacements, and I'm not sure if you ever really could. If you have a torn diaphragm, or yours are just old and dry from being 20+ years old, this is for you. I met with Paul from JBM industries. Paul manufactures OEM replacement parts for many carbureted bikes, including isolator boots. Mike Norman used them on his NC35, and if they are good enough for him, they must be pretty good. He is confident in being able to make replacements. Because these diaphragms are only applicable for the 4th gen VFR, he would need a full order to cover his costs to make the initial batch. If you know other bikes that use these same diaphragms, let me know. http://jbmindustries.com/ Only the rubber diaphragm will be provided. Read through JBM's page on replacement instructions, but these will involve clipping the plastic ring off and gluing the new rubber on. He will mold in extra thickness to have the rubber replace the ring, as he has done with over parts. If you are not confident on replacing them yourself, we can work on having someone replace them for you. I will be providing a sacrificial set of parts for him to do his prototyping on if we make the orders. For Paul to go through with this, he needs a commitment of 30 sets at $80 per set of 4. This does not include shipping. He normally handles production of new molds and products at the beginning of winter, but will confirm if we get sufficient orders. Sign up, ask around, lets see if we can make this happen. I'm starting off with 3. Order list: (8/1/2018) 1. YoshiHNS 2. YoshiHNS 3. YoshiHNS 4. COS_VFR 5. SamW 6. Marsman99 7. scottbott 8. burnes45 9. LauraM 10. rangemaster 11. magpie114 12. Smack 13. Smack 14.vfrgo 15. vfrg0 16-26. Billy C 27. COS_VFR 28. kevinmacdonald 29. 30. @kgsmotorcycles @Dutchy @mcrwt644